what is merely proposed here, is that for example like i said muslims get some courts or any kind of institution to resolve inheritance disputes and the like according to Islamic system.
Now, this doesn't bother anyone, it doesn't hurt anyone, muslims want it, and it doesn't enforce anything on non-muslims. As for other minorities, if their religion have some sets of rules that can also be applied without messing with the government then i don't see any problem. The point in my eyes, that makes secularism good for these places with a wide variety of religions, is that it doesn't allow any religion to affect others who do not adhere it and stops the oppression. Did you get a wrong impression about what is proposed here, or do you have a problem with this particular idea?